Lathing.



A. P. WHITE.

LATHING.

APPLICATION FILED APR. 8, 1910.

Patented J an. 7, 1913.

\\\\\\\\\v K \\\\\\\\\\\x at a low cost, as will more 'which lthefollowin .which it is made. e

ALEXANDER r. WHITE, or CALDWELL, NEW .Haarsma Larme.

" Specification of Letters Ilaitcnt.`4

/ Application med April 8, 1910.- Serial No. 564,168.

To all wlwm, t may concern: n

Be it known that I, ALEXANDER P. Wm'rn, a citizen-of the United States,residing in Academy street, Caldwell, county of Essex, State of NewJersey, have invented a new and useful Improvement in Lathing, of is aspecification. This invention re ates to lathing for holdand ceilingsand the obing plaster on walls ject of it is to provide an imcprovedarticle hereinafter.

Figure 1 is a perspective view of the im. proved lathing,

'indicating one method b 2 -s an enlarge cross section showing metallicmembers embedded in the fibrous material. Fig. 3 is a plan view showingopenings or hole's forming keys for the plaster. Fi 4 isa cross sectionon the line 4-4 o Fig. 3, showing depressed lip portions designed to 4incline the plaster .to .engage the wire memed to form a key bers. Thedotted lines in the ligure indicate the plaster body. Fig. 5-is a viewin perspective, showing .a modification having a roughened surface towhich the plaster can adhere.

Like reference letters refer to like parts in ythe-different figures. l

A represents the sustaining members B the fibrous material; C theopenings adaptfor the plaster; D lips, formed by pressing down theportion of the fibrous sheet slitted to make the openings C, andv E theplaster substance.

' At the present time net like structures formed by weaving wires arelargely used v to hold plaster. Expanded metal made by mortar musttherefore .be of a heavy slitting sheet metal and s reading open theslitted portions into net l1ke fabrics' is also extensively employedforthe same purpose, butin the use of both these articles coni siderabletrouble is experienced byl reason of the tendency of the thinfand narrowmetallic strands` to cut the mortar. To avoid undue .waste when appliedto them the thick consistency, and its application requires slow an reatcare. Moreover, even with cautious a plication, it frequently happensthat the ight metallic structure early appear will not sustain theburden of an ordinary* iirst layer .or coat of mortar, making it thennecessary to create a foundation for the substantial body, by firstapplying a preliminary thin coatin which on setting prevents anymovement o rigidity required. On account of t e value of met-al, and thedifficulty of manipulation y when the metal is heavy, it is notpractical to make the aforementioned lath fabricsl heavy. Thestrandsmust be near one another in order that the o It will be seen presentlythat my invention, however, permits a more eiiicient distribution 'ofthe metal and which the plaster can e tion against rust. The liability othese metallic lath fabrics to corrode when used in present `forms,constitutes a serious objection. Many of theplaster preparations incommon use, ble walls and ceilings, contain ingredients which causerapid deterioration from rust, especially in spots exposed to theatmosphere. Another .advantage of the new product which is peculiar tothis novel of lathing, is that it is possible with its use to protectthe plaster wall itself as well as Patented Jan. 7, i913.

the metal and im arts the r penings be of small y dimensions, capable ofholding the plaster.

rovides a structure to applied readily and quickly without particularcare and skill, and without undue waste. It will be seen, too, that itprovides also thorough rotecwhile excellent for making durav the metalfrom deterioration, due to the condensation of moisture. This result iseffected by applying to the reverse side, i. e., the side which does notreceive the plaster, a coating ofl waterproofing compound of which thereare a number well known, but

it is not desirable to apply the compound on the 'side which receivesthe plaster, since it would interfere with the tendency of the plasterto adhere to the fibrous material.

In carrying out the' invention, `I prefer form a grid, the 4wires beingarranged at suitable distances apart to act as sustainingy members forthe plaster. I select a fibrous material, such as paper, and cover onesurface of the same with silicate of soda, 0fthe consistency of ordinarymucilage. Between layers of the paper I placethe wires, and pass thepaper and wires between mechani` o'f the lathing sheet so as to Aandconsolidate, forming a strong, rigid sheet,

as indicated by Fig. 1. V

It is obvious that a' paste made by`boiling 5 a mixture of ryeflour andwater, or numerous other adhesive pre arations may y be used, inheu ofsilicate o soda.

ing, can be adapted to roughenthe surface rovide `for the adhesion ofthe plaster. T e roughening may consist of suitable indentations orderessions, or instead, the sheet maybe perorated or punctured. Theopenings are preferable, and it is highly desirable to make the openingsnear, or adjacent the wire members, especially the heavier members, soas to permit the plaster to engage the Wires as shown in Fig. Li. It isalso desirable to make the openings with a lip as shown in Fig. 4, byslitting the paper, and pressing down theslitted portion instead ofcutting it away.T The lips are designed to cause the plaster to spreadand increase the clench, as

' y25 Well as to. cause the plaster to engage the wires when theopenings are adjacent to the Wires.

Since .the fibrous material is thus designed to serveas a vehicle tocarry the plaster until place, it is as in the present structures, andthat a given 'quantity of metal can be disposed in thick strands ormembers in this combination imparting much greater strength, than ifdivided into a larger number of smaller members. I prefer to use atintervals of about seven inches, wires of l2 or 14 gage, U. Si.standard, and to use lighter Wires, about 20 40 gage, about one inchapart, intermediate-the heavier ones. Crossed wires are placed atdistances suiiicient to hold ythe other wires in place, or the crossWires may be entirely omitted. p

AlthoughI have described a simple Way of' making the :material voi theinvention, it can be made in other Ways, as for instance,

' by Wholly or partly embedding the wires in the fibrous product Whilethe fibrous mate- '50 rial is in a .plastic state. In such case, it isalso desirable to use silicate of soda which can be introduced by mixingit into the plas- -tic mass, before it is rolled or pressed. ',Ihiscompound, (silicate of soda) serves not only 5-5 to add greatly to thestiffness of the article Vbut also to give it tire resisting ualities.

It is important to make the brous part of the composite lathingrelatively thin so that it will not become a substantial portion \of theWall body. The fibrous sheet should be no thicker than is necessarytoperform the function of rigidly' holding the plaster in place, becausethe Wall body should be as nearly homogeneous as possible, instead ofespecially w consisting of vdifferent substances of ent physicalproperties.

The function of the paper is not to become an integral or permanent partof thewall body, but to serve only temporarily to give formto theplaster and coperate with the metal to hold the plaster in place, untilit The rolls or other instruments for press'4 dries and hardens enough,to depend on the metal parts for v permanent support. After the plasteris dry, the pa er may be scraped oli without impairing t e Wall body,but this of course, 1s not necessar and seldom possible except inpartition wa s.

It is well known'that a wet body of laster changes its physicalconformation .in that the contraction'with theI departure o themoisture, however slight it may be, meets resistance when the Wet massis against ay solid, inflexible or immovable surface, often causing theplaster to crack, but the paper,

en of an absorbent character, will accommodate'itself to these changesafter having, in its capacity as a mold, caused the plaster to take theform desired. I have, therefore, Ain the claims of this specification,employed the term flexible to distinguish the paper in my article fromthe inflexible slabs and boards which, after a finishing coat of plasteris (applied to them, are intended to continue essential permanent partsof the wall structure. It is of course understood that .the paper mustbe substantial enough for its purpose, and it is desirable to break the`paper surface with numerous perforation's, so as to diminish liabilityonthe part of the paper to Warp, or prevent injury, in'

. l. A structure for lathing consisting of a seriesl of metal membersembedded in a supporting body of fibrous material, the said fibrousmaterial being depressed between the metal members, thus forming raisedribs or `ridges which project beyond the plane ofY the lathing.

2. A structure for lathing consisting of va series of metallic membersand a body of -ibrous material in which the metallic mem bers areembedded forming ribs, said body having openings therein, and the ribsbeing disposed adjacent the openings to permit the plaster to engage theribs, and the parts of the said ribs in proximity to said openings beingcovered with a protective coating of` broiis material.

3. A structure for lathing'consist-ing of a body of fibrous materialhaving openings therein, primary and secondary reinforcing meansembedded in said body and dis osed adjacent the openings to permit the paster to engage said means, the parts of the said reinforcing means inproximity to said openings being covered wlth a protective coating `offibrous material.

4. A building form consisting of a series' of metallic members and asupportin body therefor of brous material 1n whic said metallic. membersare embedded formin ribs, said body having openings therein, an

the ribs being disposed adjacent the opening 10 to permit the plaster tobecome engaged wit the ribs.

